Controlling device for the ends of discharge pipes



March 25, 1941.

J. K; LUND CONTROLLING DEVICE FOR THE ENDS OF DISCHARGE PIPES J. fnzjfgzog Attorrze ,5,

Filed.April' 4, 1938 Patented Mar. 25, 19 41 I hNlTED STATES PATENT OFF-ICE? CONTROLLING DEVICE FOR THE ENDS .OF

DISCHARGE PIPES James K. Lund, Oak Park, n1., assignor to The Dole Valve Company, Chicago, 111., a corporation of Illinois Application April 4, 1938, semi No. 199,761 2 Claims. (01. 123-174) This invention relates. to controlling devices for convenient place in the circulatory system. for the ends of discharge pipes, such as overflow or moving the liquid. vThe pump 5 is operated in vent pipes forautomobile radiators, and has for any desired manner, as by a belt driven by the its object to :provide a new and improved device engine and engaging the pulley 6. v

of thisdescription. There is a cap I for closing the opening in 5 When automobiles areused in cold weather, it. the radiator through which the cooling liquid is is customary to provide in the cooling circulatory inserted. The radiator is provided with a vent 9 system, of the engine a non-freezing liquid, such which is a small pipe and which preferablfhas as, for example, alcohol. This liquid passes from its upper end extending into the space I9 above 0 the engine jacket through the radiator, cooling in the liquid in the radiator, the extreme end ll 10 the radiator and passing back to the engine jackbeing preferably bent as shown. 7

et. The radiator is provided with an overflow Some means is provided for closing the endof or vent pipe so as to relieve the pressure and perthe pipe 9. This means is arranged so that after mit the escape of steam and other vapors in case any overflow liquid in the pipe 9 reaches a prethe liquid overheats and boils. When volatile determined height, the closed end will open and 15 65 there being preferably a pump 5 located at any not escape. 65

material, such as alcohol used, if the overflow permit it to escape. As herein shown, the end of or vent pipe is left open, much material is lost by the pipe 9 is closed by a valve device. I2 which is the vapors passing out and escaping. One of made of elastic material such as rubber. This the objects of this invention is to provide a. cheap, valve device is open at one end and the pipe 9 is go easily installed *nd efiective means for closing the insertedin this open end. Since the device is end of the vent pipe to prevent the escape of the 'made of elastic material, the same device can be: material under ordinary conditions and to autoused for'pipes of diiierent sizes and this is par-- matically open and relieve the pressure when the ticularly true since these pipes vary only "a small pressure in the vent pipe reaches a. predetermined amount in size. a amount and before this pressure is sufilcient to The valve device I! is hollow and is. provided 25 o ny damage to any of the parts. at the bottom with a slit I; which is normally The invention has further objects which are closed. The valve device is preferably flattened i more particularly pointed out in the accompanyout at the lower end. In the construction sh0w n'"" in description this result is secured by having one side of the 3s Referring now to the drawing. Fig. 1 is a view valve device straight, as shown at I4, and the of one form of device embodying the invention, opposite side inclined, as shown at l5. One of with a portion of the motor omitted and a porthe sides is preferably thicker than the other, as,

tion of the radiator cover broken away; for example, the side It. The lower end of the Fi 2 i an nlarged view. with parts broken valve device, is also preferably wider than the v away, of the end of the radiator vent with the upper part, as shown, for example, in Fig. 2. losi dev ce h r n; I prefer to provide some means for preventing a Fig. 3 is a view similar to Fig. 2, with the parts vacuum in the system from causing the sides of turned ninety degrees; the valve device to collapse to prevent air from Fig. 4 is a view of the closing device as seen entering to relieve the vacuum. Any suitable 40 from t e t means may be used and I have illustrated one 40 Fig. 5 is a sectional view taken on the linel-S construction where there is a rib IS on the inner of Fig. 3;. face of one of the walls of the device, see Figs. 3 Fig. 6 is a view in section showing a modified and 5. If the walls are collapsed, with this conconst ct o and [I struction the slit I! will open sufliciently to let in Fig. 7 is a view of Fig. 6 as seen from the side air to relieve the vacuum. This device can be having the slit intermediate its ends. I arranged to open when there is a predetermined Like numerals refer to like parts throughout pressure in the pipe 9. It will ordinarily be arthe several fig r s.- ranged to open when there is a pressure eq l to Inthe drawing there is illustrated a circulatory several inches of liquid in the pipe. For examcooling system for the internal combustion enpie, it may be arranged to start to open at one- 50 gine of an automobile. The engine is provided fourth pound pressure and fully open at one with a water jacket I. A pipe 2 leads from this pound pressure. water jacket to the radiator 3 and a return pipe This device therefore provides a closed pipe 9 A returns the cooling liquid to the water jacket, and therefore a closed system so that vapors canand lets some of the liquid out.

closes before all the liquid is discharged, so that In Figs. 6 and 7 I have shown another form for breaking a vacuum in the system. The liquid accumulates in the overflow pipe due to the surging in the top of the radiator and condensation of the vapors formed at the fluid level in the radiator, which vapors pass on down the overflow pipe, and this is particularly true where alcohol is used. Under normal driving conditions the pressure of the column of liquid will not be suflicient to open the pressure slit I! at the bottom of the valve device or the vacuum slit I! in the side wall thereof. It often happens that when the automobile is stopped and the radiator fluid cools, the vapors in the space above the fluid level are condensed. Under these conditions a vacuum is created in the radiator. This causes the accumulated liquid in the overflow pipe to be drawn back into the radiator. This vacuum also causes the thin portion of the wall of the device to be moved inwardly, that is the walls as it were, collapse, and this causes the slit I! to open'so as to admit air and break the vacuum in the system. After. the pressure has been balanced, the parts are returned to their normal position. If overheating occurs so that there will be a high pressure in the radiator, the thin section wall will bulge outwardly and this will open the pressure slit l3 and relieve the pressure in the radiator. If the pressure is very high, the vacuum slit l1 will also open to assist in relieving the pressure.

This device also provides awater or liquid seal,

for ifopened by the pressure of the liquid, it will close when the liquid reaches a few inches from the lower end of the valve device. It will also be noted that the discharge of the material is in alignment with the pipe 9. This construction does not make any noise or rattle due to the movement of the parts and the automobile. In the use of the device, if there is gas generated, as when alcohol is used, the valve device I! prevents it from escaping. If there is an overflow into the pipe 9 of the liquid, the valve prevents this escaping until it reachesa predetermined height in the pipe, whereupon the slit l3 opens This slit then there will be a water or liquid seal maintained. I prefer to make the device of a single or unitary piece oi material.

Among other advantages in having the lower end 'of the valve device widened is that I am enabled to provide a longer slit and at the same time, have it automatically held closed by the material until the pressure of the liquid above it reaches a predetermined amount.

I have described in detail a particular construction embodying the invention, but it isof course evident that the parts may be varied in many particulars without departing from the spirit of the invention as embodied in the claims 7 hereto appended and I therefore do not limit in said pipe, a second slit in the elastic material of said hollow member located above the first mentioned slit, the first mentioned slit opening when there is abnormal pressure in the radiator to relieve such abnormal pressure, the second slit opens when there is a reduced pressure in said radiator to relieve such reduced pressure.

2. A controlling device for the end of a discharge pipe for automobile radiators, comprising a valve device adapted to be connected with the end of the pipe, said valve device comprising a hollow member of elastic material having an open end with which the pipe is connected and having a discharge slit at the other end at a distance from the open end which is normally closed to maintain liquid in said pipe under normal pressure in the radiator and which opens to relieve abnormal high pressure in the radiator, and means separate from said slit for relieving reduced pressure in said radiator.

JAMES K. LUND. 

